10 ways to help Barn Owls: Manage land for Barn Owls; Provide a nest box; Avoid Rat Poison; Feed in bad weather; Buy from wildlife-friendly farmers. read more
In the UK, I believe there is a program that, if you have a barn suitable for owls, you can apply to have a pair located there (one of my brothers has such a barn and did this). The barn can't be too near a road though, because apparently barn owls are prone to getting hit by cars while swooping across while hunting. read more
We can make Owl Boxes in our garden, or persuade your teachers in school, to put a few up. read more